Influence of structural and constructional parameters of knitted fabrics on the thermal properties of men's socks

The research is focused on determining the influence of structural and

constructional parameters of rib knitted fabrics on the thermal properties

of men's socks. Men's socks are made in three different pattern

constructions of three types of basic yarns: bamboo, cotton and a

cotton/polyester blend with the additional filament polyamide yarn and

wrapped rubber wire for the so-called render socks. For all analyzed sock

rib patterns, the most important structural parameters of the yarn and

construction parameters of the knitted fabrics were determined. Thermal

properties of socks such as the cool touch feeling property, thermal

conductivity, heat retention coefficient and thermal resistance were

determined by using Thermal Labo and Thermal Mannequin measuring devices.

The structural and constructional parameters of knitted fabrics were shown

to affect the investigated thermal properties of the socks, making them more

or less insulating or heat conducting. Values of the warm-cold feeling

parameter as well as thermal conductivity vary depending on the construction

pattern, showing a decrease as the number of face loops is increased i.e. in

the sequence R1:1> R3:1> R7:1. The ability to retain heat decreases in the

opposite sequence R7:1 > R3:1 > R1:1. The highest values of heat retention

were determined for R7:1 rib knitted socks by both methods. A regression

equation has been established with thickness, loop length, mass per unit

area and porosity as independent variables, and thermal resistance

(determined by the Thermo Labo method) as the dependent variable. The loop

length and mass per unit area were shown to contribute significantly to the

model.